Mill for cutting grain



(No'ModelL) 3 Sheets-Sheet 1.

E. 0-8 J. o. SMITH.

MILL FOR GUTTINGGRAIN.'

No. 594,972. Patented Deo. 7,7189?.

x Y H a (No Model.) 3 Sheets-Sheet 2.

E. o. a J. o. SMITH.

MILL FOR CUTTING GRAIN.

10.594,972. Patentedneo. 7, 1897.

(No ModeLg) 3 Sheets-Sheetl 3.

E. 0. au J.v o'. SMITH, MILL FOR CUTTING GRAIN.

www; MW @www xv @56M n Q 1 jgw l @www @www 1M Norms virtus co, PHoTtLuTHO.. wAsmncJoN, Q C- "fr NITED STATES 4 PATENT rrrcn.

ELVAII C. SMITH AND JAMES O. SMITH, OF NEWTON, IOWA.

MILL FOR CUTTING GRAW.

SPECIFICATION forming part of Letters Patent No. 594,972, dated December '7, 1897.

Application led April 10, l 8 9 '7.

To all whom t may con/cern.-

Be it known that We, ELVAH C. SMITH and JAMES O. SMITH, citizens of the United States, residing at Newton, in the county of Jasper and State of Iowa, have invented a new and useful Mill for Cutting Grains of Wheat,

Oorn, Oats, dac., of which the following is a` specication. 1

Our object is to provide a simple, strong, durable, and efficient portable mill for cutting grains of wheat, oats, corn, dto., into particles adapted for food for man and beast.

Our invention consists in the construction, arrangement, and combination of one or more cylinders carrying cutters, and means for simultaneously adjusting the cutters relative to a stationary cutter with a suitable frame or case, as hereinafter set forth, pointed out in our claims, and illustrated in the accompanying drawings, in whichm Figure l shows an -outside View of a por-l tion of one of our cylinders. Fig. 2 is a face view of the finished end of Fig. l. Fig. 3 is a longitudinal sectional view of Fig. l. Fig. 4 is a transverse sectional view on the line wx of Fig. l. of our mill, showing two cylinders arranged and combined with a hopper to be operated simultaneously as required to facilitate the speedy cuttin g of grain fed to the cutters from the intervening single hopper. Fig. 6 is an outside face view of ,the mill. Fig. '7 is a perspective view of a piece of a frame adapted for adjustably fastening detachable cutters thereto and also fastening the ends of -the frame adjustably to the parallel sides of the case. Fig. 8 is an end view of the mill, showing the two cylinders connected with driving mechanism. Figs. 9 and l0 show a modiied form in which the cylinders are closer together and a single cutter-support adjustably connected therewith. Fig.l ll is a detail view showing the manner of combining and adjusting a single cutter-support with the two cylinders. Figs. l2 and 13 show a mill having a single cylinder mounted upon a frame.

The letter A designates a metal cylinder that may vary in length and diameter as desired.

- B is a shaft iixed in the cylinder and provided with journals on its ends that extend Fig. 5 is a vertical sectional view Serial No. 631,514. (No model.)

through bearing L, formed on or fixed to the parallel sides of the case, as'shown in Fig. 8. Sections of the end portions of the shaft are screw-threaded for the application and operation of devices for adjusting and locking cutters fitted in slots formed in the cylinders. Seats O for removable and adjustable cutters in the form of straight slots or kerfs are cut inward from the periphery .to extend straight from end to end of the cylinder and tangentially relative to the curved surface, as clearly shown in Fig. 4. Straight cutters d are iitted in said seats C and provided with integral tapering extensions d at their ends that project outward from the ends of the cylinder A to be engaged by a collar F, that is fitted to the screw-threaded portion of the shaft B. The outside surface of this collar is screw-threaded and its inner edge beveled to iit against the under sides of the beveled extensions d of the cutters d.

His a ring providedwith an annular lateral extension Hiand fixed to the end of the cylinder A by means of tap-bolts and in concentric position with the shaft B.

F2 is a collar that has an internal screw fitted to the exterior of the collar F and its inner edge beveled to engage the outer tapered edges of the extensions d' of the cutters d.

F3 represents a metal guard fixed to the ring H to prevent grain from falling outside of the ring into the annular vacant space that surrounds the flange H2.

J is a'nut fitted on the screw-threaded portion of the shaft B to lock the adjustable parts in fixed positions.

Each end of each cylinder A is formed in the same manner and provided with the same kindof devices for adjusting the cutters and locking them in fixed positions.

The frame or case adapted to support the cylinders is composed of two parallel sides K (preferably metal) and two end pieces K2, rigidly united by casting them together' in molds orin any suitable way. Bearings L for the shaft B are formed on or fixed to the sides K, as shown in Fig. 8.

L2 is an inclined plane fixed in the case and extends out through an opening in one of the ends thereof.

M are cutter-supports adj ustably connected with the sides K to support cutters M2, bolted IOO thereto. These supports are cast in molds and have inclined flanges Nat their top edges and right angled ends N2, provided with curved slots P, through which bolts P2 are extended through perforations in the parallel sides K to receive nuts as required ,to clamp the cutter-supports fast thereto and thereby j ustably and detachably fastened thereto, can l be readily adjusted by means of set-screws as required to raise and lower the cutters M2 relative to the cutters d, carried by the i the screw-threaded portions of the shaft, lockcylinders A.

A2 is a cover hinged to one of the ends 1K2 of the `case and has 4a hopper R at its center 1 and a double-inclined fixed bottom R2,adapted i to direct grain to the parallel cylinders A.

Cut-olf slides S are fitted in slots in the hopper to `direct and control :the flow of grain from the hopper.

In the practical operation ofour mill the plurality of cutters CZ in a cylindercan be readily and simultaneously adjusted as required to cut grains into fine or coarse food. The closer the sharp edges of the cutters d come to the sharp edge oftheffixed cutter M2 as the cylinder rotates toward the said fixed cutter the finerwill be the product ofthe mill. To

move thecutters cl outward, the locking-colg lars F2 must be moved outward, and the collars F then `moved inward relative to theends of the cylinder A, and the 'locking-collars F2 l then also moved inward .to again simultaneously lock all the cutters d by :thecontact of the beveled inner edges of the locking-collars with the outside tapering edges of the integral projections CZ' at the ends of the cut-1 ters d.

VVhen the cutters d .and M2 are adjusted relative to each other as desired, grain will` be fed to thecylinders A through the hopper R, and the iiow or quantity regulated 'by 3 means of the slides S, and thecuttersrotated i toward each by meansiof power applied to a belt-wheel B2 and the gear-wheels on the ends of the parallel shafts of the `twocylinders A.

We `claim as our inventionn l. In 'a `mill for cutting grain, a cylinder.

shaft and beveled at their inner ends to engage the outside edges of the tapering extensions of the adjustable cutters, and means for fastening the movable collars in fixed positions relative to the shaft and cylinder, arranged and combined to operate in the manner set forth for the purposes stated.

2. In a mill for cutting grain, a cylinder having straight slots extending from end to end longitudinally and tangentially to a circle within that of the cylinder, straight cutters tted in said slots and having tapering extensions at their ends, a shaft extended from the ends of the cylinder and portions thereof screw-threaded, collars having external screws and beveled at their outside inner edges to engage the inner edges of the tapering extensions of the said cutters fitted to ing-collars fitted on the collars on the shaft and beveled at their inner ends to engage the outside edges of the tapering extensions of the adjustable cutter,'and means for fastening the movable collars in fixed positions relative to the shaft and cylinder, rings fixed to the ends of the cylinder and provided with annular flanges extending at right angles to cover the concentric collars on the shaft, arranged and combined to operate in the inanner set forth for the purposes stated.

3. ln a mill for cutting grain, a cutter-support consisting of a metal frame having a fiat straight central part and an inclinedflauge at its top edge, right-angled end portions provided with curved slots and straight cutters adjustably fixed to the central portion, in combination with the parallel sides ofa frame or-case, and a cylinder carrying adjustable cutters vmounted upon said frame orcase, arranged andcombined to operate in the manner set forth, for the purposes stated.-

4. A inill for cutting grain, comprising a frame or case having an inclined bottom, a hinged top or cover, a hopper fixed to the cover, a bottom in the hopper inclined in reverse ways from its center, two cylinders mounted in parallel positionon opposite sides of the hopper, adjustable cutters having internal tapering extensions at theirends fitted in slots extended tangentially to the circles within those of the cylinders, collars having beveled edges to engage said extensions for adjusting and locking said cutters in the cylinders, cutter-supports, having straight cutters adj ustably fixed thereto, adjustably connected withthe parallel sides of the frame or case to extend parallel with the cutters carried .by the cylinders, and means for rotating the cylinders toward each other, all arranged and combined to operate in the manner set forth, for the purposes stated.

ELVAl-I C. SMITH. JAMES O. SMITH. Witnesses:

J. II. FUGARD, J. W. ALLFREE.

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